How quickly we learn things varies from person to person, but there are some things which can help us to learn faster and, surprisingly, exercise is one of them. We know that any exercise that makes your heart beat faster is great for your body and can even help improve your mood, but we know less about the effects of exercise on learning. However, scientist have recently discovered that for a period of time after you’ve exercise, your body produces a chemical that makes it easier for your brain to learn. So, if you’re stuck on a homework problem that is too difficult to solve, go out and play a game of football, then try the problem again.
You just might discover that you’re able to solve it.
(Find out a word that means (the way you are feeling at a certain time.

effect
mood
chemical